(In the world of professional skiing, ski racing, selected freestyle skiers, upper-level alpine skiing, those skiers 'in the know')
A lower-class skier. A skier that cannot ski a blue or black ski run. A certain breed of skier frowned upon by other skiers that know what they are doing. Often wears the 'punter uniform' consisting of a jacket from the 60's, jeans tucked into ski boots, a baseball cap and sunglasses or a neckwarmer worn as a hat. If this describes you, go away.
Also, all snowboarders.

"Look at that guy who just crashed! What a punter!"
"Where did you learn to ski? You're such a punter!"